package g34930.td6;

import java.util.Scanner ; 

public class AfficherPairS2 { 

    public static void main ( String[] args ) { 

	Scanner clavier = new Scanner ( System.in ) ;  
	int i, n;
	n = clavier.nextInt();
	for ( i = 1; i <= n/2; i ++ ) {

		System.out.println(2*i);

	}


    }

}
